Poultry drinking unit



FIG. 1 is a perspective view taken from the top, front and one side of a poultry drinking unit showing my new design;

FIG. 2 is an elevational view taken from the side opposite that shown in FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a poultry drinking unit, as shown. 